MinTTY feature? Or bug?
Andy Koppe
andy.koppe@gmail.com
Thu Jan 29 22:19:00 GMT 2009
Lee D. Rothstein wrote:
> Interesting feature or bug of MinTTY that does not obtain with any other
> terminal emulator with which I'm familiar.
>
> To wit:
>
> If you have a running synchronous script or command to the screen and you
> type ^l (Ctrl-l) it will immediately clear the screen before the ongoing
> command terminates.
>
> My feeling is that it doesn't matter, but that the behavior is different
> from other virtual terminals.
I've had a look at this: it's a feature that MinTTY inherited from
PuTTY. PuTTY emulates features of a whole range of terminals from VT100
through to VT510, and also the so-called 'SCO ANSI' (from before SCO
became a dirty word).
Apparently the latter interprets the echoed ^L as an actual form feed,
whereas all the others just do a linefeed. (There's a separate sequence
for clearing the screen, which bash sends when it sees a ^L being typed.)
The default compatibility setting includes 'SCO ANSI', hence the
behaviour you're seeing. I'll take it out in the next release.
Andy
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